Fortinet FortiClient up to 6.2.1 on Linux Backup File privileges management

Summaryinfo

A vulnerability has been found in Fortinet FortiClient up to 6.2.1 on Linux and classified as critical. Impacted is an unknown function of the component Backup File Handler. This manipulation as part of Backup File causes privileges management. This vulnerability appears as CVE-2019-16155. The attack requires local access. There is no available exploit.

Detailsinfo

A vulnerability was found in Fortinet FortiClient up to 6.2.1 on Linux. It has been declared as critical. Affected by this vulnerability is an unknown part of the component Backup File Handler. The manipulation as part of a Backup File leads to a privileges management vulnerability. The CWE definition for the vulnerability is CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A privilege escalation vulnerability in FortiClient for Linux 6.2.1 and below may allow a user with low privilege to overwrite system files as root with arbitrary content through system backup file via specially crafted "BackupConfig" type IPC client requests to the fctsched process. Further more, FortiClient for Linux 6.2.2 and below allow low privilege user write the system backup file under root privilege through GUI thus can cause root system file overwrite.

The weakness was presented 02/07/2020 (Website). It is possible to read the advisory at fortiguard.com. This vulnerability is known as CVE-2019-16155 since 09/09/2019. Attacking locally is a requirement. A single authentication is necessary for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 02/07/2020). The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

See VDB-149758, VDB-149759 and VDB-149760 for similar entries. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• Fortinet

Name

• FortiClient

Version

• 6.2.0
• 6.2.1

License

• free

Website

• Vendor: https://www.fortinet.com/

CPE 2.3info

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CPE 2.2info

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Entryinfo

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